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Bulging lower radiator hose


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For the last few weeks, I have had a coolant smell, but didn't see anything. Well...... Today I had a whiff when I was driving, and when I got home I had a little steam coming out fom under the hood.  The car never got above 196 degrees.  The lower hose is bulging, and appears to have sprung a small leak.  The radiator and surge tank were replaced 3-4 years ago as preventative maintenance.  I never replaced the original hoses.  Today I ordered a gates upper and a gates lower hose.  

Hopefully this is not caused by an overpressurized cooling system (if you know what I mean).  I thought these were lifetime hoses?  Do the nylon bands just break from age?  I'll keep my fingers crossed with a ratchet in my hand when the parts come!!

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